package com.grayscale.dashboard.web.base;

import com.github.pagehelper.PageHelper;
import com.github.pagehelper.PageInfo;
import com.grayscale.dashboard.constant.Constants;
import com.grayscale.dashboard.util.DateUtils;
import com.grayscale.dashboard.util.StringUtils;
import com.grayscale.dashboard.vo.UserVo;
import com.grayscale.dashboard.web.page.PageDomain;
import com.grayscale.dashboard.web.page.TableDataInfo;
import com.grayscale.dashboard.web.page.TableSupport;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.web.bind.WebDataBinder;
import org.springframework.web.bind.annotation.InitBinder;
import javax.servlet.http.HttpServletRequest;
import java.beans.PropertyEditorSupport;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;

/**
 * web层通用数据处理
 * 
 * @author liuli
 */
public class BaseController
{
    protected Logger log = LoggerFactory.getLogger(this.getClass());

    /**
     * 将前台传递过来的日期格式的字符串，自动转化为Date类型
     */
    @InitBinder
    public void initBinder(WebDataBinder binder)
    {
        // Date 类型转换
        binder.registerCustomEditor(Date.class, new PropertyEditorSupport()
        {
            @Override
            public void setAsText(String text)
            {
                setValue(DateUtils.parseDate(text));
            }
        });
    }

    /**
     * 设置请求分页数据
     */
    protected void startPage()
    {
        PageDomain pageDomain = TableSupport.buildPageRequest();
        Integer pageNum = pageDomain.getPageNum();
        Integer pageSize = pageDomain.getPageSize();
        if (StringUtils.isNotNull(pageNum) && StringUtils.isNotNull(pageSize))
        {
            String orderBy = pageDomain.getOrderBy();
            PageHelper.startPage(pageNum, pageSize, orderBy);
        }
    }

    /**
     * 响应请求分页数据
     */
    @SuppressWarnings({ "rawtypes", "unchecked" })
    protected TableDataInfo getDataTable(List<?> list)
    {
        TableDataInfo rspData = new TableDataInfo();
        rspData.setCode(0);
        rspData.setRows(list);
        rspData.setTotal(new PageInfo(list).getTotal());
        return rspData;
    }
    /***
     * 没有SQL分页的  内存分页,假分页
     * @param list
     * @return
     */
    protected TableDataInfo getDataTableNoSql(List<?> list,PageDomain pageDomain)
    {
        TableDataInfo rspData = new TableDataInfo();
        rspData.setCode(0);
        if (list == null){
            rspData.setRows(new ArrayList<>());
            rspData.setTotal(0);
        }
        int fromIndex=(pageDomain.getPageNum()-1)*pageDomain.getPageSize();
        int toIndex =fromIndex+pageDomain.getPageSize();
        if (fromIndex>list.size()){
            fromIndex =0;
            toIndex = 0;
        }else if(list.size() <= toIndex){
            toIndex = list.size();
        }
        rspData.setRows(list.subList(fromIndex,toIndex));
        rspData.setTotal(new PageInfo(list).getTotal());
        return rspData;
    }
    /**
     * 响应返回结果
     * 
     * @param rows 影响行数
     * @return 操作结果
     */
    protected AjaxResult toAjax(int rows)
    {
        return rows > 0 ? success() : error();
    }

    /**
     * 响应返回结果
     * 
     * @param result 结果
     * @return 操作结果
     */
    protected AjaxResult toAjax(boolean result)
    {
        return result ? success() : error();
    }

    /**
     * 返回成功
     */
    public AjaxResult success()
    {
        return AjaxResult.success();
    }

    /**
     * 返回失败消息
     */
    public AjaxResult error()
    {
        return AjaxResult.error();
    }

    /**
     * 返回成功消息
     */
    public AjaxResult success(String message)
    {
        return AjaxResult.success(message);
    }

    /**
     * 返回失败消息
     */
    public AjaxResult error(String message)
    {
        return AjaxResult.error(message);
    }

    /**
     * 返回错误码消息
     */
    public AjaxResult error(int code, String message)
    {
        return AjaxResult.error(code, message);
    }

    /**
     * 页面跳转
     */
    public String redirect(String url)
    {
        return StringUtils.format("redirect:{}", url);
    }


    public UserVo getSysUser(HttpServletRequest request)
    {
        Object user = request.getSession().getAttribute(Constants.LOGIN_USER);
        if (user != null){
            return (UserVo)user;
        }
        return  null;
    }

  }
